Question

How do you evaluate `80+ ( - 63)`?

Answer 1

It's basically saying `80-63`, so the answer is `17`.

To put it visually:

`< -63 ... 0 ... 80 >`

Pretend that's a timeline. They want you to ADD -63 to 80, so you would count down from -63 to the right of the timeline--and you would land on 17.

So `80-63=17`